'From Pharo1.2.1 of 2 April 2011 [Latest update: #12345] on 18 October 2011 at 8:33:25 pm'!GridDirection subclass: #GridDirectionNorth	instanceVariableNames: ''	classVariableNames: ''	poolDictionaries: ''	category: 'Lase-Game-Model'!"-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- "!GridDirectionNorth class	instanceVariableNames: ''!!GridDirectionNorth class methodsFor: 'abstract-implementation' stamp: 'RobsonAlecioSomera 10/4/2011 11:40'!adjacentDirection	^ GridDirectionSouth.! !!GridDirectionNorth class methodsFor: 'abstract-implementation' stamp: 'RobsonAlecioSomera 10/4/2011 10:07'!directionSymbol	^ #north.! !!GridDirectionNorth class methodsFor: 'abstract-implementation' stamp: 'menegazzo 10/18/2011 20:33'!vector	^ 0@1 negated! !